Zoho Mail: ActiveSync with Outlook 2013: what works and what does not work. Please clarify.

Zoho Mail: ActiveSync with Outlook 2013: what works and what does not work. Please clarify.

I am having trouble with consistent results with ActiveSync and Zoho Mail using Outlook 2013 (Updated) on Windows 10.

I am finding that the only consistent results I get with ActiveSync is updating of "Inbox" and "Sent" folders.

Otherwise, it does not:

- accurately update user-added email folders.
- include or update/add "Drafts"
- accurately add update (up/down) "Calendar"
- accurately add update up/down "Contacts"
- include or add update (up/down) "Notes" 
- include or add update (up/down) "Tasks" 

Is this consistent with what others are experiencing?

Are these issues resolvable by Zoho?

If not, I can go back to using just IMAP, but then I've had such trouble with the Mail Suite Sync program that I can't get my Calendar and Contacts to synchronize.  So I'm left with no working solution for a full working email system that works across platforms...

Thanks,

Todd